Automatic ejecting fuse



March 2, 1937. H. BAUMAN AUTOMATIOEJECTING FUSE Filed May 5, 1936 2Sheets-Sheet 1 1nvnior h. 2 3a a/77a/7 By 22mm A itorneys H. P. BAUMANAUTOMATIC EJECTING. FUSE March 2, 1937.

Filed May 5, 1936 2 Sheets-Sheet 2 A iio rneus Patented Mar. 2, 1937UNITED STATES PATENT OFFICE 2,072,290 AUTOMATIC EJECTING FUSE Heinz P.Bauman, Detroit, Mich.

Application May 5, 1936,

1 Claim.

This invention appertains to new and useful improvements in fuses andmore particularly to a novel device wherein the fuse is ejectedautomatically.

5 The principal object of the present invention is to provide a devicein the form of an automatic fuse which when blown results in theautomatic ejection of the whole fuse cap, thus indicating immediately tothe attendant which of a group of 10 fuses has blown.

Other important objects and advantages of the invention will becomeapparent to the reader of the following specification.

In the drawings:-

15 Figure 1 represents a side the device.

Figure 2 is a longitudinal sectional view.

Figure 3 is an end elevational view of the plug portion of thestructure.

Figure 4 is a section on the line 4-4 of Figure 3.

Figure 5 is an end elevational view of the cap portion of the fuse.

Figure 6 is a section on the line 6-6 of Fig- 25 ure 5.

Figure 7 is a perspective view of the fusible element.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that 30 numeral 5 generally refers to the plug section ofthe fuse, while numeral 6 generally refers to the cap section of thefuse.

The plug section 5 consists of a body 1 of insulation having the threadformed annulus 8 35 thereon. At one end of the body I is the insulationplate or disk 9 in which the contact I is mounted.

Extending into the body I from the opposite end thereof are the pocketsIl-ll in which the 40 '.U-shaped spring contacts l2 are mounted, one ofwhich is connected with the thread-formed conductor annulus 8 and theother with the contact Ill.

The cap section 6 includes the body l3 of in- 45 sulation and in thisbody the contact prongs M are suitably anchored and allowed to project aelevational view of Serial No. 78,044

substantial distance beyond one side of the cap so as to engage into theU-shaped spring contact I2 of the plug section 5. The cap I3 is formedwith a pocket Hi from the back wall of which projects the stub I6 aroundwhich the coiled compressible spring I! is disposed with one endimpinging against the back wall of the pocket IS. The opposite end ofthe spring bears against the circular intermediate portion l8 of thefusible element I!) which is secured by soldering, welding or othermethod or means at its end to the contact prongs l4-l4. The fusibleelement l9 has the flanges 20-40 around the free edge portion of thecentral portion l8 thereof to assist in properly guiding or retainingthe spring l1.

It can now be seen that with the sections -6 assembled in the mannershown in Figure 2, any rupture of the fuse l9 will free the spring l1and it will exert its tension against the fuse and against the section5, thus throwing the entire cap l3 away from the plug section 1. Thus ata glance, an attendant can tell which one in a group of fuses is blown.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having thus described the invention what is claimed is:-

A fuse plug of the character described compris ing a plug section, a capsection, said plug section being provided with pockets, contacts in thepockets, contact prongs on the cap section adapted to engage into thepockets and with the contact in the said pockets, a fusible elementconnected at its end to the contact prongs, and a coiled compressiblespring interposed between the cap and the fuse normally held compressedby said fusible element, said fusible element having a circular centralportion provided with a peripheral flange within the confines of whichone end convolution of the spring is normally located.

HEINZ P. BAUMAN.

